Harrow-tooth and harrow attachment



(N0 Mod'el W'. H. HOBSON. HARROW TOOTH AND HARROW ATTACHMENT. I No, 376,801. v Patented Jan. 24, 1888.

W messas: KM' S MJQ 7 I Y U ITED STATES P TENT Ounces v WILLIAM HENRY HOB SON, OF MONTE, MISSOURI.

HARROW-TOOTH AND HARROW'ATTACHMENTQ SPECIFICATION forming part of Letters Patent No. 37e,ao 1, dated January 24, 1888.

Application filedDecembcr 1886. SerialNo. 221,204. (No modell To all whom it may concern.-

Be it known that 1, WILLIAM HENRY HOB- s0N,a citizen of the United States,-residin'g at La Monte, in the county of Pettis and State of Missouri,have invented certain new and useful Improvements in Harrow-Teeth and Harrow Attachments; and I do hereby declare the following to bea full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention consists in certain novel constructions, combinations, and arrangements of In the accompanying drawings, Figure l is I a perspective view of a cultivator provided row-teeth, and Fig. 9-is a horizontal section:

with my improved barrow attachment. Fig. 2 is an enlarged perspective view of one of the inner cultivator shovels, a portion of the shovel-bar, and my harrow attachment. Fig. 3 is'a perspective view of one of a pair of coupling-plates forming part of my lnventlon. Fig. 4 is a diagram illustrating the relative positions of the cultivator-shovels and my.

harrow attachment and barrow-teeth to one another and to the line of'drait. Figs. 5 and 6 are longitudinal sections, respectively, of a twisted and of a plain barrow-tooth and their fastenings. Figs. 7 and 8v are perspective views of modified constructions of said harinthe line w a; of the barrow-teeth.

A in the drawings represents a cultivatorframe; B, axles; 0, wheels; D, cultivatorbeams; E, shovels, and F harrow.

The above-named parts, excepting the harrow, may be of ordinary construction, as found in machines for cultivating corn.

The cultivator-beams D, being hinged to the axles B, can be elevated and depressed by handles (1. The two inner cultivator-beams are provided with arms d, whichareattached to said beams by means of pivots d and hops ings d, of well known construction, whlch at any desired vertical angle.

respectively, being of beveled or wedge shape,

permit limited oscillations of the arms d". To

the arm at the harrow F is attached by means of a coupling, G, which consists of two disks, 9, having each a straight or plain surface,with lugs gandspacesbetween them,andsoarranged that the arm (1 and the barrow-bar f can be provided with radial serrations g",by means 0f whichthe twodisks y can be firmly held 'at different angles when united by a central screw-bolt, g and the arm (1 and barf, being united by the same bolt, 9?, may bethus held The disks 9,

the horizontal angle-of the arm d and bar f may be so adjusted that the narrow: stands moreor less oblique to the line of draft, ac-

The

cording to the distance between rows of corn will cut weeds and pulverize the earth very will not throw uplarge clods and stones, as is .done by the cultivator-shovels. I .7

The barrow-teeth f f are fastened to the barrow-bar f by means of bolts f and they "so effectively along the slope of a corn-row, and

are held in vertical or in an inclined position by aid of angular offsets f, formed on the top portion of the barrow-teeth. The said angular offsets f form a right angle with the broad side of the tooth, and stand inclined toward its narrow sides, and through the latter forma-' tion the tooth obtains a small allowanceiof corner, f, of the offsetfflwhen causedto bear upon the top surface of the barrow-barf, will keep the barrow-tooth in a perpendicularpomotion around the bolt 1, inasmuch as the one sition, and the other corner,'f under similar hole, f symmetric with theholef into which latter the bolt 9 is inserted, as represented in the drawings. The harrow is reversed by disconnecting it from the arm (1, then turning its rear end to the front, and reattaehing to the arm at by inserting the bolt 9 into either the hole f or f, as the case may be.

The arm d is provided with an angular projection, d which is connected with the frame A by means of a spring, d, the tension of which holds the harrow-teeth down into the ground sufficiently deep for ordinary harrowing. When the tension of said spring is not sufiicientto keep the harrow teeth in the earth, the harrow can be pressed down to the required depth by hand with the aid of a handle, f suitably attached to the harrow-bar. By means of said handle f the harrow can also be lifted out of the ground whenever the safety of the harrow-teeth requires. The harrow-teethff areheld down in the ground to their proper working depth, and while this is so they and their'bars serve as fenders for pushing lumps and stones along and toward the valley between the corn row ridges being harrowed. The barf also extends sufificiently beyond the inner cultivator-blade to serve as a fender for it, and it thus prevents the rolling of heavy lumps and stones upon the plants at the ridge.

By attaching the harrow in the manner described it operates withoutlateral motion from or toward the cultivator-bar, but may be moved vertically independent of the cultivator-bar. It may also be laterally adjusted to form a more or less acute angle with the line of draft, and to stand at various inclinations toward a horizontal plane. Thus it will be seen that my harrow attachment is suitable for all requirements in cultivating. 1

It will not in all cases be found necessary to employ adjustable harrow-teeth ff", as the condition of the land may be suitable for the use of vertical teeth altogether, in which case I will attach said harrow-teeth rigidly to the harrow-bar. My'harrow-barf, with the teeth f f, may also be employed in the construction of a triangular or rectangular harrow, and when thus employed the operation of the straight and twisted teeth f f will be exactly the same as when attached to the cultivator.

It will be seen that the disks by means of their serrated surfaces, can be united at several different positions without danger of displacement, such varietyof positions being desirable in order to obtain the most advantageous position for the harrow-bar necessary for vided with spaces between the lugs g, which spaces run at right angles to one another, the one or the other of said disks can be turned a quarter around,or upside down,iu order to suit any inclination of the harrow required for its adjustment upon the ridgesto be cultivated.

WVhencver the changes effected by the different relative positions of the disksg do not sufliciently contract or expand the pair of harrows, the harrow-bars f may be shifted longitudinally without reversal by being fastened at the holef orf", as circumstances may require.

It will be seen from the drawings that my harrow attachment, with its improved teeth,

-or, if desired, with ordinary harrow-teeth, is

adapted for application on each side of the row of plants, so as to come betweenthe plants and a right-hand shovel on one side ofthe ridge and the plants and a left'hand shovel on the other side of the ridge, and thus answer the ordinary purposes of fenders while performing the office of harrowing the soils 7 It will also be seen that the two harrow at tachments can be set farther apart or nearer together while standing divergent from one another, accordingly as the distance between the rows requires; also can be inclined more or less to suit the incline of the ridges and depth of thevalleys. I

WVhat I claim is 1. The combination,withastraddle-row cultivator having cultivator-shovels on each side of the row of plants being cultivated, of two symmetrical oblique harrows, F F, having arms d',pivoted, respectively, to the cultivatorbars and located between the respective inner cultivator-bars and the row of plants,and each adapted for harrowing a sloped surface of the ridge of earth about the row of plants, substantially as and for the purpose described.

2. The oblique harrow bar f, having its straight and twisted sharpened teeth all on a. line, each alternate tooth twisted or each alternate tooth straight, and each tooth formed with an integral offset, fflwhich is oblique with respect to the upper edge of said barf, and confined bya bolt, f in combination with the pivoted arm d and cultivator-bar D, thearm 11 being pivoted to the bar D, substantially as and for the purpose described.

3. The oblique harrow bar f, having its straight and twisted teeth f'f arranged on a 1ine,and a straight tooth succeeded by atwisted tooth,or a twisted tooth succeeded by a straight tooth, whereby both the straight and twisted teeth have their cutting-edges set diagonally to the line of draft, one set in the direction of the line of the harrow-bar and the other set across said line of the bar, substantially as-and for the purpose described.

4. The combination of a cultivator-bar,arm d, harrow F, and an adjusting disk-coupling, G, having beveled serrated surfaces, substantially as and for the purpose described.

5. The combination of the oscillating armd -IIO of harrow F, the cultivator-frame A, and the spring d substantially as and for the purpose described. I

6. The combination, with a cultivator-bar, g 5 D, of aharrow,F,on anoscillating arm, d, said 10 7. The combination, with the barrow-barf and its pivoted arm d,and with the cultivatorbar D and fastening-bolt, of the coupling G, consisting of the bevel-faced disks g,having serrated surfaces,'as g, and equidistant lugs g, with intersecting spaces between them,whereby the barrow-bar, with its teeth, can be set more or less inclined-to the horizon, and also more or less oblique to the row of plants and the line of draft, substantially as and for .the purpose described.

8. The combination of the coupling G, having bevelfaced disks which are provided with suitable means by which they are adjusted relatively to each other, a s described,'with the barrow-tooth barf, whereby-the harrow-bar, 25 with its teeth, can be set more or less oblique to the line of draft or row of plants, substantially as and for the purpose described.

9. In combination with a barrow-bar, the barrow-tooth formed above its pivot-conned 0 tion with an offset, f, integral with the, body of the tooth and set at an angle oblique to the edge of theharrow-bar to which it is attached, and to the length of said bar, sothat when the tooth stands inclined-it is sustained'by one side 3 5 of said offset bearing against the bar,and when t it is set vertical it is also sustainedby the opposite side of said offset bearing against said bar, substantially as described.

In testimony whereof I affix my signature in o I presence of two witnesses.

WILLIAM HENRY HOBSON. 1

Witnesses: I

J. N. MILLER,

J W. MoARToR. 

